Heating-boiler.



@ WITNESSES: IN VENTOR.

A. G. GRIPPS.

HEATING BOILER.

APPLICATION FILED 124, 1909.

977,786. Patented. Dec. 6,1910.

2 SHEETS-SHEET 1.

A'TTOR Y.

THE NORRIS PETERS cu. wasmrvcram by c,

A. e. GRiPPS. HEATING BOILER. AYPLIOATION FILED MAY-24, 1909.

2 sums-811mm.

INVENTOR.

ATTORN is: NORRIS PETFRS co., wnsnlycron, n, c,

Patented Ba 6, 1910.

FiFlQll.

ALFRED G. CRIPPS, OF AKRON, OHIO, ASSIGNOR TO PRUDENTIAL HEATING COMPANY, OF AKRON, OHIO, A CORPORATION OF OHIO.

HEATING-BOILER.

To all whom it may concern:

Be it known that I, ALFRED G. Carers, a citizen of the United States, residing at Akron, in Summit county and the State of Ohio, have invented a new and useful Improvement in Heating-Boilers, of which the following is a full, clear, and exact specification, reference being had to the accompanying drawings, which form a part thereof.

My invention relates to sectional heating boilers, and especially to that type of sec tional heating boilers provided with two grates, a down draft and an up draft grate.

The object of my invention is to provide a sectional boiler comprising joined end and intermediate sections with vertical side water legs and a down draft grate formed of hollow grate bars connecting the .water legs of the sections; and a further object of my invention is to provide a sectional boiler having intermediate sections with vertical side water legs and a down draft grate formed of hollow grate bars made integral with the sections.

My invention is fully shown in the accompanying drawings where similar letters are used to designate similar parts.

Figure l is a vertical section, to show the water passages and the smoke flues, along the line 1 1 of Fig. 2; Fig. 2 is a horizontal section through the intermediate sections along the line 2 2 of Fig. 1; Fig. 3 is a perspective view showing a boiler with the front section removed; Fig. 4 is a section along the line etl of Fig. 1.

Referring to the figures, A represents the intermediate sections, and B and B the front and rear end sections, respectively, which enter into the construction of a boiler.

C is a vertical water leg of which each intermediate section has two, one on each side.

D is a vertical flue extending upwardly between adjacent sections from the space beneath the hollow grate bar E to the flue I which extends longitudinally through the intermediate sections, above the grate bar E.

F is a combustion chamber beneath the hollow grate bars E and above the plain grate G.

J is a smoke flue extending through the boiler longitudinally from front to rear and connected with the fines I by the connecting flues M at the front of the boiler.

K is an outlet piece attached to the rear Specification of Letters Patent.

Application filed May 24, 1909.

lower grate G and will be burned.

Patented Dec. 6, 1910. Serial No. 497,998.

section B in connection with the flue J, and having the smoke outlet L to which a smoke pipe leading to a chimney may be attached.

N is a door carried by the front section B which serves as the outside wall of the passage M.

H is the ashpit beneath the grate.

a and a are nipple openings in. which nipples are placed so as to connect the sections to one another. The openings 0 in the lower part of the legs C are to connect the water spaces of the sections so as to secure circulation of water from section to section; and the openings at are to connect the steam spaces of the sections so as to have an equal pressure in all the sections. The hollow grate bars E are of less dimension in the direction of the length of the boiler, that is at right angles to the width of a section, than the water legs O, as shown in Fig. 2. The result is that when two sections are put together as in Fig. 2, there is a space F between'the hollow grate bar E of adjacent sections. The flues D are formed by the junction of channels cZ formed on each side of the water legs of each section, and extending from below the grate bars E to the flues I.

The operation of the boiler is as follows: A fire is built on the down draft grate formed of the grate bars E and fresh fuel is fed onto this grate through a suitable door at the front of the boiler. Air is admitted in such quantities as are necessary into the space above the down draft grate, and the products of combustion pass downward between the grate bars E into the combustion chamber F and from there into the vertical fiues D. Through these the products of combustion pass upwardly into the side longitudinal flues I, and through these to the front of the boiler into the middle longitudinal flue J, and from there to the rear of the boiler to the smoke inlet. Any fuel, either partially or wholly unburned, that may fall between the grate bars E of the down draft grate will lodge on the If the air passing downward between the grate bars E of the down draft grate in insuflir cient to burn the fuel on the lower grate G, air may be admitted from below through the ashpit H. By means of the down draft grate composed of the hollow grate bars E, I am able to burn bituminous coal without smoke; and the lower grate catches such unconsumed fuel as falls from the upper grate and allows it to be completely burned.

The result of my construction is that I have a boiler that is not only economical in the use of bituminous coal, but that is also smokeless.

The grate bar E is cast integral with and connects the water legs of a section. This permits constant, rapid circulation of the water throughout the boiler; and avoids any additional cost in forming an upper grate other than that necessary to put the sections together. I prefer to run the bars of the lower grate G longitudinally of the boiler so that they will be at right angles to the bars E of the upper grate.

In the drawings I have shown the lower grate wider than the upper grate, but the proportion of one grate to the other may be varied without departing from the spirit of my invention.

hat I claim as new and desire to secure by Letters Patent, is:

1. A sectional heating'boiler comprising joined end and intermediate sections with vertical water legs, a down draft grate formed of hollow grate bars connecting the water legs of said intermediate sections, and an up draft grate, and having vertical smoke fiues at the side of said boiler formed between said up and down draft grates and extending upwardly to a smoke flue extending longitudinally of said boiler above the down draft grate, substantially as described.

2. A sectional heating boiler comprising joined end and intermediate sections with side Water legs, a down draft grate formed of hollow grate bars made integral with and connecting the water legs of said intermediate sections, and an up draft grate below the down draft grate, and a pair of horizontal fines, one on each side, extending above said grate longitudinally of the boiler, and vertical flues at each side of said boiler formed between the water legs of adjacent sections connected with the space between said down draft and up draft grates at their lower ends and with said horizontal flues at their upper ends, substantially as clescribed.

3. A sectional heating boiler comprisinggrates and extending upwardly to horizontal fines in the upper part of the boiler by means of'which smoke is made to pass longitudinally through said boiler to the front and then to the rear, substantially as described.

In testimony wheeof I have signed my name to this specification in the presence of two subscribing witnesses.

ALFRED Gr. ORIPPS. \Vitnesses W. T. VAUGHAN, JENNIE SWAN. 

